How To Set Up ModSecurity with Apache on Ubuntu 14.04 and Debian 8
ModSecurity is a free web application firewall (WAF) that works with Apache, Nginx and IIS. It supports a flexible rule engine to perform simple and complex operations and comes with a Core Rule Set (CRS) which has rules for many exploits. For Apache, it is loaded as an additional module which makes it easy to install and configure. In this tutorial, you will learn how to install and configure ModSecurity and create custom rules.